BIBLIOGRAPHY 383 



Pool, R. J., 1914. Vegetation of the sandhills of Nebraska. Minn. Bot. Studies, 



4:312. (267) 

 PospELOV, V. P., 1926. The influence of temperature on the maturation and 



general health of Locusta migratoria Linn. Bull. Entom. Res., 16:363-367. 



(184) 

 Post, H., von, 1862. Studien liber die koprogenen Bildungen der Jetztzeit.: 



Gyttja, Dy, Torf und Humus. K. Sv. Vet Akad Hand!., 4. (73, 96) 

 1867. Forsok till iakttagelser i djur- och viixt-statistik. Ofversikt af Kongl. 



Vetenskaps-Akad. Forhandlingar No. 2. (5) 

 Pound, R., 1892. Symbiosis and mutualism. Am. Nat., 509-520. (138) 

 Pound, R., and F. E. Clements, 1898. The phytogeography of Nebraska. 2nd 



ed. 1900. Lincoln. (120, 251) 

 Powers, E. B., 1921. Experiments and observations on the behavior of marine 



fishes toward the H-ion concentration of the sea water in relation to their migra- 

 tory movements and habitat. Pub. Puget Sd. Biol. Sta., 3:1-22. (316) 

 Preble, E. A., 1908. A biological investigation of the Athabaska-Mackenzie 



Region. U. S. Dept. Agr. N. Am. Fauna, 27:1-574. (201) 

 1923. Birds and mammals of Pribilof Isle, Alaska, N. Am. Fauna, 26:1-128. 



(170) 

 1925. British Columbia, NaturaUst's Guide to the Americas; Baltimore. See p. 



155. (293) 

 Price, W. A., 1929. Calcium and phosphorus utilization in health and disease. 



Dent. Res. Lab. Cleveland Bull., 79:1-32. (214) 

 PuRCHAS, S., 1657. A theater of political flying insects, wherein especially the 



nature, the worth, the work, the wonder and the manner of right-ordering of 



the bee is discovered and described. London. (198) 

 PtJTTER, August, 1908. Die Ernahrung der Wassertiere. Zeits. allg. Physiol., 



7:283-320. (297) 



Quayle, E. T., 1922. Local rain-producing influences under human control in 

 South Australia. Proc. Roy. Soc. Victoria, 34:89-104. (93) 



Raunkiaer, C, 1934. Life forms of plants and statistical plant geography. Oxford 



Press, New York. (48, 49) ^ 



Rasmussen, D. I., 1932. The biotic communities of the Kaibab Plateau. INlanu- 



script, Univ. of 111. Library. (33, 185, 201) 

 Rawson, D. S., 1928. PreUminary studies of the bottom fauna of Lake Simcoe, 



Ontario. Univ. Toronto Studies: Biol. Series, Pub. Ont. Fish. Res. Lab., 



No. 36. (306) 

 1930. The bottom fauna of Lake Simcoe and its role in the ecology of the lake. 



Univ. Toronto Studies: Biol. Series, Pub. Ont. Fish. Res. Lab., No. 40. (306) 

 Read, C, 1920. The origin of man and of his superstitions. Cambridge. (131, 154) 

 Rensch, B., 1931. Der Einfluss des TropenkUmas auf den Vogel. Proc. VII Inter. 



Ornith. Congr. Amsterdam. 197-205. (214) 

 Regnard, p., 1891. Recherches experimentales sur les conditions physiques de la 



vie dans les eaux. Paris, 500 pp. (297) 

 Reighard, J., 1908. Methods of studying the habits of fishes, with an account of 



the breeding habits of the horned dace. U. S. Bur. Fish. Bull., 28:1111-1136. 



(311, 358) 



